Cristiano Ronaldo may have proposed to his girlfriend -- and baby mama -- Georgina Rodriguez.

Rodriguez, 24, was spotted at the World Cup on Wednesday, supporting Ronaldo, 33. But the world spotted something else.

On Rodriguez's ring finger was a huge sparkler, believed to be a £615,000 (approx. $1.1 million AUD) Cartier piece that, according to SunSport, Ronaldo reportedly purchased last month. And her friend was VERY impressed.

(Backgrid)

According to the Daily Mail, Rodriguez commented on a photo of the ring shared by Cartier, with love eye emojis.

In 2015, Ronaldo revealed on The Jonathan Ross Show that he plans to tell his son who his mother is eventually.

"When Cristiano is going to grow up, I am always, always going to say the truth to him because he deserves it, because he is my son," he said. "But I am not going to say because people want me to say."